The ABB S202-D20 (order code 2CDS252001R0201) is a two-pole miniature circuit breaker from the System pro M compact S200 range, rated 20 A with a D tripping characteristic. Like every S200, it is current-limiting and combines a delayed thermal release for overloads with an electromagnetic release that trips instantly at 10 to 20 x In for short circuits.
Reading the type code: S202 = S200 series, 2 protected poles; D = tripping curve; 20 = rated current in amperes. The breaker is 2 modules wide (35 mm) and snaps onto a 35 mm DIN rail.
Technical data
| ABB type | S202-D20 |
|---|---|
| ABB order code | 2CDS252001R0201 |
| Range | System pro M compact S200 |
| Poles | 2P |
| Tripping characteristic | D |
| Rated current (In) | 20 A |
| Rated operational voltage Un (IEC/EN 60898-1) | 400 V AC |
| Rated operational voltage Ue (IEC/EN 60947-2) | 440 V AC |
| Rated short-circuit capacity Icn (IEC/EN 60898-1) | 6 kA |
| Ultimate breaking capacity Icu (IEC/EN 60947-2) | 10 kA |
| Service breaking capacity Ics (IEC/EN 60947-2) | 7.5 kA |
| Instantaneous (magnetic) trip range | 10 to 20 x In |
| Thermal release | 1.13 x In no trip (> 1 h), 1.45 x In trip (< 1 h); reference 30 °C |
| Rated insulation voltage Ui | 250 V AC phase-earth, 500 V AC phase-phase |
| Rated impulse withstand voltage Uimp | 4 kV |
| Electrical endurance | 20,000 operations (AC) |
| Mechanical endurance | 20,000 operations |
| Terminals | Failsafe bi-directional cylinder-lift, 35 mm² solid/stranded, 25 mm² flexible, busbar 10 mm² |
| Tightening torque | 2.8 N·m (Pozidriv 2) |
| Dimensions per pole (H x D x W) | 88 x 69 x 17.5 mm |
| Width | 35 mm (2 modules) |
| Protection degree | IP20 (IP40 in enclosure with cover) |
| Ambient temperature | -25 to +55 °C |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
| Condition | New, original ABB |
Typical applications
- Motor circuits with high starting current
- Welding equipment and other high-inrush loads
- Industrial distribution boards feeding machinery
- Pumps and compressors started direct-on-line
- Direct replacement of an ABB S202-D20 with the same order code
Compatibility and replacement
The order code 2CDS252001R0201 identifies exactly this pole count, curve and rating. Bottom-fitting auxiliary and signal contacts, shunt trips, undervoltage releases and motor operating devices from the System pro M compact range fit the S200 (accessories are sold separately). If your installation needs 10 kA breaking capacity, the S200 M version of the same rating has the same 88 x 69 mm pole size. When replacing, keep the curve (D) and rating (20 A) the circuit was designed for.
Frequently asked questions
Should I use the D curve or the C curve?
The D curve trips instantly at 10 to 20 x In; the C curve trips at 5 to 10 x In. D is for loads with heavy inrush such as motors and transformers; for ordinary circuits C trips magnetically at a lower fault current.
Can it be fed from the bottom?
Yes. ABB lists the supply direction as optional and the mounting position as any, and the twin terminals accept cable and busbar together.
What is the difference between 6 kA and 10 kA on the label?
Per ABB, 6 kA is the rated short-circuit capacity Icn under the household standard IEC/EN 60898-1; 10 kA is the ultimate breaking capacity Icu under the industrial standard IEC/EN 60947-2 at 230 V. Both apply to this breaker.
Related parts
- ABB S202-D16 Miniature Circuit Breaker 2P 16A D-Curve
- ABB S202-D25 Miniature Circuit Breaker 2P 25A D-Curve
- ABB S204-D20 Miniature Circuit Breaker 4P 20A D-Curve
- All ABB Miniature Circuit Breakers
Used across industrial control panels, distribution boards and machine-building applications for reliable overcurrent and short-circuit protection.
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